I am trying to figure out what my calipers are off of. First off let me start by saying I have two sets of pbr calipers of which are slightly different. I painted one set which came out real nice but when I went to screw in my stainless brake hose it didn't thread in so I put a wrench on it and it stripped the first two threads on the caliper. Now I used the stock brake hose bolt for new stainless hose and that worked fine. My next problem was that I had no bleeder screw so I was gonna swap one of the bleeders from the other set of calipers to the ones that I had already mounted but that was different also. I then for shits and giggles put the stainless hose on the 2nd set of calipers and it threaded in there fine. So basically my question is what are these calipers off of that makes the threads different on the hose and bleeder? If I used my other set of calipers my new hoses would have bolted on just fine. Any ideas?